/Engine/Source/Runtime/Engine/Classes/Materials/MaterialInterface.h
Holds information about a hierarchy of materials
struct FMaterialInheritanceChain
constUMaterial...
BaseMaterial
Base material at the root of the hierarchy
constFMaterial...
CachedExpressionData
Cached expression data to use
TArray< const c...
MaterialInstances
All the instances in the chain, starting with the current instance, and ending with the instance closest to the root material